The 1SMA4739A with Zener Diodes SMA RoHS manufactured by Jingdao is a voltage regulator designed for the highly reliable PCB assembly process. It consists of a series of Zener diodes arranged in a row with axial leads for easy soldering. It has reverse leakage protection, a breakdown voltage range between 5.0V to 40V, maximum power of 350mW, and a very low operating temperature of -55°C to +175°C. It has a maximum reverse surge current of 5A and is designed to conform to the European RoHS Directive, meaning that it is free of hazardous substances like lead, mercury, cadmium, and hexavalent chromium. The 1SMA4739A is RoHS compliant and a great choice for use in PCB assemblies.